6 th Grade Cards 1. Which of these is NOT a benefit of biodiversity? 6. Which animal listed below would complete this food chain?

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1 1. Which of these is NOT a benefit of biodiversity? A. medicine B. food C. gold D. oxygen 6. Which animal listed below would complete this food chain? A. fly B. lizard C. butterfly D. hummingbird 2. Which of the following is one reason that an animal may become extinct? A. expansion of the animal's hunting area B. abundance of the animal's food C. loss of the animal's habitat D. the animal's lack of predators 7. Which of the following is a food chain? A. B. C. D. 3. What happens during a "mass extinction"? A. All large mammals die. B. A species is hunted to extinction. C. Animals are forced to migrate to a new habitat. D. Most organisms die. 8. Look at the picture and then fill in the blank. This picture shows. A. an environment B. a growing animal C. a food chain D. a life cycle 4. Fill in the blank. Scientists estimate that there are different species inhabiting the earth. A. 100 to 1000 B. 1 to 10 million C. 10 million to 100 million D. 50 to Mice and rabbits eat plants. They are known as herbivores. Mice, and rabbits are also called A. consumers B. decomposers C. producers D. predators 5. Which animal listed below would complete this food chain? A. snake B. toad C. cricket D. owl 13. Parasitism and mutualism are examples of which of the following? A. cooperation B. competition C. commensalism D. symbiosis

2 14. Meerkats live in groups. At least one member of the group will stand guard while the others in the group look for food. This is an example of A. competition B. commensalism C. cooperation D. symbiosis 16. Whales often have barnacles attached to them. The barnacles get carried through the ocean which increases their chances of finding food. The whale is not harmed by the barnacles. This is an example of a relationship. A. parasitic B. competitive C. symbiotic D. predator/prey 17. Paper cups, cans, cigarette filters, and plastic bags scattered along the ground are examples of what kind of pollution? A. air pollution B. litter C. recycling D. water pollution 19. Fill in the blank. The ozone layer protects the earth from. A. carbon dioxide B. too much radiation C. acid rain D. air pollution 18. If phosphates and nitrates from detergents are allowed to enter a lake or pond, an abundance of algae may begin to grow. How does an increase in algae growth harm a lake or pond? A. Algae use much of the oxygen in the water. B. Birds, fish, and turtles do not eat algae. C. Algae act as sponges and soak up all the water. D. Algae turn the phosphates into toxic 20. During a rainstorm, chemicals from air pollution in the atmosphere may come back to the earth as A. wastewater B. gasoline C. acid rain D. red rain 21. Why would an ecosystem be unable to sustain an increase in carnivores? A. There is not enough prey. B. The carnivores now have more space. C. Plant growth increases. D. It is a marine ecosystem. 22. Which abiotic factor in an ecosystem helps to control population size? A. plant growth B. plenty of sunlight C. species of animals D. availability of space 23. Fill in the blank. Food, space, temperature, and disease can stop a population from increasing in size. These are known as. A. limiting factors B. mutual benefits C. ecological relationships D. population controls 24. A population's is the rate at which it would produce young if every new individual lived and reproduced at its maximum capacity. A. biotic potential B. primary rate C. limiting factor D. ecological pyramid

3 25. Fill in the blank. Plants rely on decomposers to provide them with. A. nitrates B. sunlight C. water D. oxygen 26. Which of these organisms is NOT a decomposer? A. mold B. mushroom C. vulture D. bacterium 27. Which of the following are decomposers? 1. yeast 2. algae 3. virus 4. mold A. 2 and 3 only B. 3 and 4 only C. 1, 2, 3, and 4 D. 1 and 4 only 29. Many plants in the desert must conserve water between rainy seasons. What adaptation might a desert plant have? A. roots that are above the ground B. tall stems so they can get more sunlight C. thin bark so water can easily evaporate D. thick leaves to store water 28. Which of the following do decomposers return to the environment? A. oxygen B. sugar C. hydrogen D. nitrogen 30. Which of the following is the best example of an adaptation? A. zebra drinking walking in the desert B. trained dogs returning a ball when it is thrown C. owls having large eyes so they can see better at night D. hummingbirds having to eat once every three minutes 31. Which of the following is the best example of an adaptation? A. the spikes on a cactus B. the water a maple tree receives C. the roots of a flower D. the leaves of a tree 32. Which of the following is the best example of an adaptation? A. a fish swimming B. a hamster eating C. a vulture flying D. a chipmunk hibernating 33. Which of the following could cause a mass extinction? A. the conservation of resources B. the seasons changing C. a comet hitting the earth D. a new predator moving into a forest 34. If the plants in a habitat become extinct, what is also in danger of becoming extinct? A. water B. sunlight C. soil D. animals

4 35. "Extinct" means there is no more of a particular plant or animal anywhere in the world. What might be one reason that an animal becomes extinct? A. There is too much food available for them. B. Their habitat is taken or changed by humans. C. They have enough room to live in. D. The environment is correct for them. 37. Which scientist is credited with the theory of natural selection? A. Aristotle B. Darwin C. Freud D. Linnaeus 36. Which of these living things is extinct? A. African elephant B. Bengal tiger C. Tyrannosaurus rex D. Humpback whale 38. Fill in the blank. As environments change, all organisms must to survive, or face extinction. A. photosynthesize B. adapt C. hibernate D. migrate 39. What could be said about an organism that CANNOT meet its needs within an ecosystem? A. It will produce more offspring. B. It will become an herbivore. C. It may become extinct. D. It may change its coloring. 41. If global warming causes the water level in the oceans to rise over time, reducing the amount of dry land on the surface of the earth, which animals have the best chance of survival? A. wolves B. yak C. whales D. orangutans 43. Which of the following is true about all "well-adapted" organisms? A. They make their own food. B. They are better predators. C. They survive to reproduce. D. They communicate with other organisms. 40. Which statement is NOT true about the theory of natural selection? A. Natural selection works very slowly. B. Well-adapted animals will have trouble reproducing. C. Camouflage aids a species in survival. D. Living things produce offspring that 42. How can an organism's coloring aid in its survival? A. It makes it easier to tell species apart. B. It helps the reproduction process. C. It helps the organism escape predators. D. It allows offspring to find their parents. 45. Which of these events would NOT bring helpful nutrients to the soil for plants to use? A. a volcano erupting B. a river flooding C. a new highway D. a forest fire

5 Sixth Grade Science Answer Key 1. C Biodiversity 2. C Biodiversity 3. D Biodiversity 4. C Biodiversity 5. C Food Chains 6. B Food Chains 7. D Food Chains 8. C Food Chains 9. C Food Webs 10. A Food Webs 11. A Food Webs 12. B Food Webs 13. D Organism Interactions 14. C Organism Interactions 15. C Organism Interactions 16. C Organism Interactions 17. B Pollution 18. A Pollution 19. B Pollution 20. C Pollution 21. A Population 22. D Population 23. A Population 24. A Population 25. A Producers, Consumers, and Decomposers 26. C Producers, Consumers, and Decomposers 27. D Producers, Consumers, and Decomposers 28. D Producers, Consumers, and Decomposers 29. D Adaptations 30. C Adaptations 31. A Adaptations 32. D Adaptations 33. C Extinction 34. D Extinction 35. B Extinction 36. C Extinction 37. B Natural Selection 38. B Natural Selection 39. C Natural Selection 40. B Natural Selection 41. C Survival of the Fittest 42. C Survival of the Fittest 43. C Survival of the Fittest 44. A Survival of the Fittest 45. C Plants and Their Environments 46. B Plants and Their Environments 47. C Plants and Their Environments 48. A Plants and Their Environments

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